deps: Update dependency grynwald.changelog to version 2

Updates-dependency: grynwald.changelog
Updates-dependency-from-version: 1.2.38
Updates-dependency-to-version: 2.0.19

Author: renovate[bot]

.config/dotnet-tools.json

@@ -9,7 +9,7 @@
       ]
     },
     "grynwald.changelog": {
-      "version": "1.2.38",
+      "version": "2.0.19",
       "commands": [
         "changelog"
       ]